Kubernetes Istio ingress gateway responds with 503 always

Question

I\'m configuring Istio using Helm. Here you can find my istio-config.yaml:

global:
  proxy:
    accessLogFile: \"/dev/stdout\"
    resources:
               


        

Answer 1

I solve this problem. istio-gateway was not capable to do redirect due to one of my services have a ClusterIP assigned:

$ kubectl get svc --all-namespaces
NAMESPACE              NAME                             TYPE           CLUSTER-IP       EXTERNAL-IP   PORT(S)                                                                                                                                      AGE
default                activemq                         ClusterIP      None             <none>        61616/TCP                                                                                                                                    3h17m
default                api-exchange                     ClusterIP      None             <none>        8080/TCP                                                                                                                                     3h16m
default                api-response                     ClusterIP      None             <none>        8080/TCP                                                                                                                                     3h16m
default                authorization-server             ClusterIP      None             <none>        8080/TCP                                                                                                                                     3h17m
default                de-communication                 ClusterIP      None             <none>        8080/TCP                                                                                                                                     3h16m
default                gateway                          ClusterIP      None             <none>        8080/TCP                                                                                                                                     3h17m
default                identity                         ClusterIP      None             <none>        88/TCP,8080/TCP                                                                                                                              3h18m
default                kubernetes                       ClusterIP      10.96.0.1        <none>        443/TCP                                                                                                                                      3h19m
default                matchengine                      ClusterIP      None             <none>        8080/TCP                                                                                                                                     3h16m
default                monitor-redis                    ClusterIP      None             <none>        8081/TCP                                                                                                                                     3h17m
default                postgres                         ClusterIP      None             <none>        5432/TCP                                                                                                                                     3h18m
default                redis                            ClusterIP      None             <none>        6379/TCP                                                                                                                                     3h18m
default                synchronization                  ClusterIP      None             <none>        8080/TCP                                                                                                                                     3h15m
default                tx-flow                          ClusterIP      None             <none>        8080/TCP                                                                                                                                     3h15m
default                tx-manager                       ClusterIP      None             <none>        8080/TCP                                                                                                                                     3h15m
default                tx-scheduler                     ClusterIP      None             <none>        8080/TCP                                                                                                                                     3h15m
default                ubc-config                       ClusterIP      None             <none>        8080/TCP                                                                                                                                     3h16m
default                ubc-services-config              ClusterIP      None             <none>        8888/TCP                                                                                                                                     3h18m
default                user-admin                       ClusterIP      None             <none>        8080/TCP                                                                                                                                     3h17m

Here one of my YAML with ClusterIP: None:

apiVersion: v1
kind: Service
metadata:
  name: ubc-config
  labels:
    app: ubc-config
spec:
  clusterIP: None
  ports:
  - port: 8080
    name: ubc-config
  selector:
    app: ubc-config
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: ubc-config
spec:
  selector:
    matchLabels:
      app: ubc-config
  replicas: 1
  template:
    metadata:
      labels:
        app: ubc-config
    spec:
      containers:
      - name: ubc-config
        image: ubc-config
        ports:
        - containerPort: 8080

As you can see, Service.spec.ClusterIP is set to NONE. To solve the problem I only change my YAML configuration to:

apiVersion: v1
kind: Service
metadata:
  name: ubc-config
  labels:
    app: ubc-config
spec:
  ports:
  - port: 8080
    name: http-ubcconfig
  selector:
    app: ubc-config
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: ubc-config
spec:
  selector:
    matchLabels:
      app: ubc-config
  replicas: 1
  template:
    metadata:
      labels:
        app: ubc-config
    spec:
      containers:
      - name: ubc-config
        image: ubc-config
        ports:
        - containerPort: 8080
          name: http-ubcconfig

I hope this helps someone.